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| author | Israel Rukshin <israelr@mellanox.com> | 2020-05-19 17:05:54 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-05-27 07:12:39 +0200 |
| commit | ba7ca2ae029607c7eb2c18e37e8bc0d2252d3d12 (patch) | |
| tree | 20ee80eb43ebdff6d6b5dbdd620fc8a5598a003b | |
| parent | 33cfdc2aa6969829f42640f758357e4b015e9f7d (diff) | |
| download | linux-ba7ca2ae029607c7eb2c18e37e8bc0d2252d3d12.tar.bz2 | |
nvme: introduce NVME_INLINE_METADATA_SG_CNT
SGL size of metadata is usually small. Thus, 1 inline sg should cover
most cases. The macro will be used for pre-allocate a single SGL entry
for metadata. The preallocation of small inline SGLs depends on SG_CHAIN
capability so if the ARCH doesn't support SG_CHAIN, use the runtime
allocation for the SGL. This patch is a preparation for adding metadata
(T10-PI) over fabric support.
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | drivers/nvme/host/nvme.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 5b5ed128fd9e..fa5c75501049 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -31,8 +31,10 @@ extern unsigned int admin_timeout; #ifdef CONFIG_ARCH_NO_SG_CHAIN #define NVME_INLINE_SG_CNT 0 +#define NVME_INLINE_METADATA_SG_CNT 0 #else #define NVME_INLINE_SG_CNT 2 +#define NVME_INLINE_METADATA_SG_CNT 1 #endif extern struct workqueue_struct *nvme_wq; |